Analysis of the Characteristics of Dominant Diseases in Traditional Chinese Medicine: Based on 95 Diseases

Background Traditional Chinese medicine (TCM) has been widely used all over the world and has shown its superiority in some diseases. However, there are no clear evaluation criteria for TCM. In 2019, a list of TCM dominant diseases was published by the Chinese National Administration of Traditional Chinese Medicine. This study aimed to systematically summarize the characteristics of 95 TCM dominant diseases and provide a reference for the establishment of evaluation criteria for TCM dominant diseases. Methods The diagnosis and treatment protocols of all the 95 TCM dominant diseases were screened. The data of disease classification, diseases' code of TCM, length of hospital stay, treatment protocols, and clinical pathways were reviewed and summarized. Results The diseases of the genitourinary and nervous systems accounted for 14.74% and 12.73% of the TCM dominant diseases, respectively. The length of hospital stay for 55 (57.89%) diseases was no more than less than 14 days. Each disease had its specific Chinese herbal decoction pieces and Chinese patent drugs. Chinese medical injections were not widely used. TCM external treatments for these diseases are abundant, with hundreds optional. Conclusion Some potentially promising TCM dominant diseases remain to be identified and deserve further research to establish the evaluation criteria of TCM dominant diseases.


Introduction
TCM has been widely used in the treatment of various diseases in China for thousands of years and has shown its potential and superiority in many diseases such as leukemia, irritable bowel syndrome, and angina pectoris [1][2][3][4][5].
erefore, the conception of TCM dominant diseases was born. e dominant diseases of TCM mainly refer to diseases for which there is currently no targeted western medical treatment and TCM has a definite effect, or the toxic side effects and drug-induced, iatrogenic disorders of TCM were less than western therapy [6]. For example, some chronic respiratory diseases, such as asthma and chronic obstructive pulmonary disease (COPD), are commonly treated with corticosteroids, which are often accompanied by side effects [7]. Based on conventional therapies, the application of TCM not only significantly improved the symptom of acute exacerbations of COPD (AECOPD) but also reduced hospital stay (mean difference, −1.21 days; P � 0.003) and the number of AECOPD readmissions (RR, 0.41; P � 0.015), greatly reducing the overall burden of disease [8].
e evaluation criteria of dominant diseases of TCM are used to define a certain disease as the dominant disease of TCM. However, the criteria should be recognized by the majority of medical workers before it is beneficial for better clinical promotion and application of TCM to provide patients with better curative medical services. Currently, the consensus within countries or industries concerning the evaluation criteria and evaluation tools for dominant diseases of TCM has not been reached yet [9]. ere are no mature evaluation systems for the definition of TCM's dominant diseases.
Commissioned by the Chinese National Administration of Traditional Chinese Medicine, the China Association of Chinese Medicine assembled a panel of TCM experts from across the country in 2018 to systematically collect and summarize opinions on dominant diseases of TCM. In 2019, a list of 95 dominant diseases of TCM was published by the Chinese National Administration of Traditional Chinese Medicine with the diagnosis, treatment program, and clinical pathway of these diseases [10]. Definite Chinese medical treatment options, clinical pathway, and objective evaluation criteria of the clinical efficacy were established for these diseases through clinical practice, with broad consensus.
is study was conducted to comprehensively summarize the classification of these TCM dominant diseases and the application of TCM treatment, aiming to identify the characteristics of the 95 dominant diseases of TCM and provide a reference for the further selection of TCM dominant diseases and establishment of clear evaluation criteria.

Data Sources.
e 95 TCM dominant diseases, promulgated by the Chinese National Administration of Traditional Chinese Medicine, were selected as the subjects of this study. Basic information about the International Classification of Diseases (ICD) 10 code [11], ICD 11-code [12], disease classification, and length of hospital stay was collected. Chinese medical treatment protocols were categorized as TCM (oral TCM decoction, oral Chinese patent medicine, and TCM injection) and external treatment of TCM (including external treatment of TCM, acupuncture, moxibustion, manipulation, anorectal of TCM, special therapy of TCM, and comprehensive therapy of TCM).
ICD is a health statistics coding tool and is widely used in clinical practice. Based on ICD 10, substantial improvement was made in ICD 11. More unique codes for injuries and diseases and a new chapter focusing on traditional medicine were also included in ICD 11 [12].

Data Extraction.
e diagnosis and treatment protocols of each disease were screened and data were extracted by two researchers independently using a standard data extraction table. en, they crosschecked the table after primary extraction. Disagreements were resolved through discussion or the suggestion of a third reviewer. e main contents of the table were as follows: disease, classification of diseases, diseases' code of TCM, length of hospital stay, diseases' name in western medicine, code in ICD-10 and ICD-11, optional TCM therapies, and optional TCM external therapies.

Statistical Methods.
Statistical analyses were performed using the SPSS software (SPSS Standard version 23.0, SPSS Inc., Chicago, IL). Continuous variables were presented as means ± SD, minimum value, and maximum value. Categorical variables were classified and shown as numbers and percentages. Differences between groups were tested by Student's t-test, chi-square test, or rank-sum test, respectively. Significant differences were defined as P < 0.05.
Although there was specific TCM therapy for each disease, not every one of them had a TCM disease code. e results showed that 33 (34.74%) of the 95 diseases had no TCM disease name and used a western medicine name in clinical practice.
Length of hospital stay ranged from ≤7 days to ≤35 days. As is shown in Table 1, a total of 50 (52.63%) diseases' average length of stay was ≤14 days and maximally not exceeding 35 days.

Application of TCM.
e application of TCM was summarized in Table 2; Chinese herbal decoction pieces and Chinese patent drugs were all used in the 95 dominant diseases of TCM. However, the utilization of Chinese medical injections varied from 28.57 to 100.00%, with a total rate of 63.16%. e lowest rate (2/7) of Chinese medical injections use was seen in diseases of the skin and subcutaneous tissue. Table 3 and Table 4 indicated that, for each of included diseases, there was at least one TCM external therapy, and the number of external therapies can reach a maximum of 10. Acupuncture, moxibustion, manipulation, and Chinese medical plastering therapy were most widely applied in these diseases. Among them, acupuncture included ear acupuncture, collateral pricking, cutaneous needle, plum-blossom needle, and many other techniques. Uncommon characteristic therapies of TCM such as acupoint injection, TCM ion introduction, TCM enema, and TCM positive ridge were also widely used in these diseases.

Discussion
Our study found that the 95 TCM dominant diseases covered multiple systems, mainly the genitourinary, nervous, and digestive systems. However, the diseases' code of TCM was incomplete and remained to be revised and improved. e length of hospital stay was mainly ≤14 days. Each disease has its own Chinese herbal decoction pieces and Chinese patent drugs. Although therapeutically effective [13][14][15], Chinese medical injections have not been widely used, which may be because of the controversy on their safety [16]. For the 95 TCM dominant diseases, there were many alternative external treatments of TCM. erapies such as acupuncture and moxibustion have been widely recognized for their efficacy, easy operation, and low cost and played an important role in the therapy process of many diseases [17][18][19].
For thousands of years, TCM has been widely used in clinical practice in China. How to inherit and develop the advantages of TCM in the diagnosis and treatment of diseases and health maintenance is still a hot topic [20]. Some scholars have proposed that strategy should, with clinical efficacy at the core, be developed based on a single disease. A study conducted in a TCM hospital indicated that, in health economics, the TCM dominant diseases are characterized by difficulties in treatment, a longer length of hospital stay, and higher hospitalization costs [21]. But evidence from other  Evidence-Based Complementary and Alternative Medicine        Diseases of the genitourinary system research suggested that because of the long-term therapeutic effect of TCM, the number of readmissions and total expenses of treatment reduced with the participant of Chinese medical treatment [22]. For example, in the TCM treatment of acute myocardial infarction, the readmission rate due to angina during the 6-month follow-up in the treatment group (2.96%) was significantly lower than that in the control group (7.88%) [23]. erefore, TCM dominant diseases are ubiquitous and need us to excavate through research. e evaluation criterion of TCM dominant diseases exactly follows the principle of focusing on a single disease and with clinical efficacy at the core. Under the guidelines of these evaluation criteria, the potential TCM dominant diseases can be evaluated one by one, and the scope of TCM dominant diseases can be continuously expanded and enriched according to the criteria of the evidence grade of evidence-based medicine. Currently, the level of evidence from TCM trials is generally low [24]. Moreover, a large number of diseases were considered TCM dominant diseases by experts but lacked high-quality evidence. erefore, it is important to establish mature evaluation criteria for TCM dominant diseases as soon as possible. With the guidance of evaluation criteria of TCM dominant diseases, finding the direction of the topic of high-quality original clinical research will also be easier [25,26].
However, the concept of TCM dominant diseases has been put forward for decades and a large number of clinical trials have also demonstrated the superiority of TCM in the treatment process of some diseases. ere have been no clear regulations to elucidate which diseases belong to the scale for the first time and described their diagnosis and treatment protocols and clinical pathways in detail, providing important references for clinical practice. As the list is derived from the collective views of experts, there is a level of subjectivity in the process of developing the list. Future studies could start with diseases in which TCM was widely used with clear therapeutic effect and an accepted TCM treatment to unearth more TCM dominant diseases. On the other hand, high-quality original research is also warranted to reinforce its theoretical basis.

Conclusion
For all the 95 TCM dominant diseases, there were definite TCM treatment protocols, clinical pathways, length of hospital stay, specific Chinese herbal decoction pieces, and Chinese patent drugs. Various characteristic TCM external therapies were widely applied in these diseases. is study may offer some reference for the establishment of the evaluation criterion of TCM dominant diseases.
Data Availability e datasets analyzed during the current study are available from the corresponding author on reasonable request.

Conflicts of Interest
e authors declare that they have no conflicts of interest.